com.sap.cloud.security.config.ServiceBindingMapper Maven / Gradle / Ivy

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package com.sap.cloud.security.config;

import com.sap.cloud.environment.servicebinding.api.ServiceBinding;
import com.sap.cloud.environment.servicebinding.api.TypedMapView;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.annotation.Nullable;
import java.util.List;

import static com.sap.cloud.security.config.Service.IAS;
import static com.sap.cloud.security.config.ServiceConstants.IAS.DOMAINS;
import static com.sap.cloud.security.config.ServiceConstants.NAME;
import static com.sap.cloud.security.config.ServiceConstants.SERVICE_PLAN;

public class ServiceBindingMapper {
	private static final Logger LOGGER = LoggerFactory.getLogger(ServiceBindingMapper.class);

	/**
	 * Parses a service binding by extracting the configuration information and passing it to a configuration builder.
	 *
	 * @return a new {@link OAuth2ServiceConfigurationBuilder} that is configured based on the given
	 *        {@link ServiceBinding}.
	 */
	@Nullable
	public static OAuth2ServiceConfigurationBuilder mapToOAuth2ServiceConfigurationBuilder(ServiceBinding b) {
		if (b.getServiceName().isEmpty()) {
			LOGGER.error("Ignores Service Binding with name {} as service name is not provided.", b.getName());
			return null;
		}

		final Service service = Service.from(b.getServiceName().get());
		if (service == null) {
			LOGGER.error(
					"Service name {} is unknown. Could not create a OAuth2ServiceConfiguration from a service binding.",
					b.getServiceName().get());
			return null;
		}

		TypedMapView credentials = TypedMapView.ofCredentials(b);
		OAuth2ServiceConfigurationBuilder builder = OAuth2ServiceConfigurationBuilder.forService(service)
				.withProperties(credentials.getEntries(String.class))
				.withProperty(NAME, b.getName().orElse(""))
				.withProperty(SERVICE_PLAN, b.getServicePlan().orElse(ServiceConstants.Plan.APPLICATION.toString()));

		if (IAS.equals(service)) {
			parseDomains(builder, credentials);
		}

		return builder;
	}

	/**
	 * Parses the 'domains' key in the credentials of an IAS configuration and configures the given builder with them if
	 * present.
	 *
	 * @param credentials
	 * 		value of JSON key 'credentials' in an IAS service configuration
	 */
	private static void parseDomains(OAuth2ServiceConfigurationBuilder builder, TypedMapView credentials) {
		List domains;
		if (credentials.getKeys().contains(DOMAINS)) {
			domains = credentials.getListView(DOMAINS).getItems(String.class);
		} else {
			LOGGER.warn("No domains found in IAS credentials.");
			return;
		}

		LOGGER.info("Domain(s) {} found in IAS credentials.", domains);
		builder.withDomains(domains.toArray(new String[] {}));
	}
}